<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width: 400px;
            height: 400px;
            background-color: violet;
        }
        .one{
            margin-bottom: 50px;
        }
        /* 距离为两个盒子的最大 */
        .two{margin-top: 200px;}
    </style>
</head>
<body>
    <div class="one"></div>
    <div class="two"></div>
</body>
</html>